Korean Journal of Fisheries and Aquatic Sciences (한국수산과학회지)

The Korean Society of Fisheries and Aquatic Science (한국수산과학회)
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Lipid and Fatty Acid Composition in Nannochloropsis oculata Cultured in Varying Salinities

염분농도에 따른 해양미세조류(Nannochloropsis oculata)의 지질 및 지방산의 변화

  • Jeong, U-Cheol (Department of Marine Biology and Aquaculture/Institute of Marine Industry, Gyeongsang National University) ;
  • Han, Jong-Cheol (Southeast Sea Fisheries Research Institute, National Fisheries Research & Development Institute) ;
  • Choi, Byeong-Dae (Department of Seafood Science and Technology, Gyeongsang National University) ;
  • Kang, Seok-Joong (Department of Marine Biology and Aquaculture/Institute of Marine Industry, Gyeongsang National University)
  • 정우철 (경상대학교 해양생명과학과/해양산업연구소) ;
  • 한종철 (국립수산과학원 남동해수산연구소) ;
  • 최병대 (경상대학교 해양식품공학과) ;
  • 강석중 (경상대학교 해양생명과학과/해양산업연구소)
  • Received : 2013.01.18
  • Accepted : 2013.05.23
  • Published : 2013.06.30
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Abstract

The quality and quantity of food organisms in fish seed production are important. The marine microalgae Nannochloropsis oculata are used as initial food organisms in the field. We investigated the effects of salinity (0, 10, 20, 30, 40 and 50 psu) on the lipid and fatty acid composition of N. oculata. Cultivation of N. oculata at varying salinities showed the highest growth rate at 20 psu. Total lipid content ranged from 17.26 to 18.63% at salinities from 0 to 50 psu). The nonpolar lipid content increased markedly at 30 psu and was highest at 15.55%. The polar lipid content was lowest at 30 psu, by 84.45%. It was also found that the omega-3 and EPA contents were inversely proportional to salt concentration. For the polar and nonpolar lipid compositions, there was no significant effect of salinity. Omega-3 polyunsaturated fatty acid content especially the content of EPA in the seawater larvae is the essential fatty acid in this food organism. It is thus advantageous to culture N. oculata at 20 psu.

Keywords

References

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